I have been trying to source properties by calling on agents to ask if they have any off-market opportunities, however this isn't returning the response I had hoped. 

I never knew that, lets try again with the link below HereAnd I agree with the assumptions you've made too, I thought it had some basement photo's but got it confused, I've been trying to look at a ton of properties to get familiar.

Can I use Solo 401(k) as source of funds to pay 25% down and leverage debt for remaining principal amount to purchase a duplex that I will owner occupy and rent the other unit?  

I use REI Automator and I really like it but it seems like most investors have never used it are more familiar with PropStream for some reason (Ive also never used PS)?

You said: "I have no idea what I’m doing re: drafting said lease :)"That will be the most expensive lease you never paid for.Seriously, use an attorney for legal documents, such as leases. 

@Walter Moneypenny As a Professional Property Manager, we use many sources and avenues to find tenants for your owners.

I am looking into AZ because it’s a less expensive market and I’ve been to Vegas but never been to AZ so i wanted at least check it out before i rule it out completely.

You start the eviction and get him out by the end of February.

The IRS doesn't have a lot of hard rules about the type of loans (or source of loans) with a 1031 exchange. 

Ended up all the way at NASA.